Toan hoc 2 Mot phan tu

ONE FOURTH ( ONE QUARTER )
A. Objectives
1. Knowledge : Help students aware of the conceptualization of “One
fourth”
1

2. Skill : Students have ability to identify , read and write 4
3. Attitude :
- Forging students seriously and positively ,
- Students interested in lesson and subjects
B. Preparation of teaching aids
-PPT , Picture , piece of square cover
-Math grade 2 textboook
C. The principal activities
Activites of Teacher
1. Warm up
- Check the number of
students
2. Check the old lesson
- Teacher
invites
3
students to do excersie
on
the
broad
“
Calculate”
28 : 4 = ?
20 : 4 = ?
32 : 4 = ?

- Teacher checks
students’s ansewer and
comments
3. Teach the new lesson
a) Introduce
In the previous lessons , our class
are learned about

1
2

and

1
3

. So

today , we are going to know the
new number , this “ One Fourth” .
b) The new lesson
 Activity 1 : Introduce the

Activites of Students
- Class president reports
the number
- All students calculate
28 : 4 = 7
20 : 4 = 5
32 : 4 = 8

- Some students read the
division table of 4

Listen carefully and write the tilte


number “One fourth”
- Aim : Students have
ability to identify , read
1

and write 4
- Proceedings :
+ Ask students to look over a

+ Students repeat

1

square , repeat how to find 2 and
1
3

of square

+ Listen carefully

+ Teacher comments and concludes
1

“ Want to find 2 of square , we
divide square to 2 parts equal , take
1

1 part , we have 2 of square . And
1

find 3 of square we do the same
things.”
+Teacher specifies the picture and
asks :
 How many parts of square are
divided ?
 Is the parts of square equal ?
 How many parts of square are
colored ?
+ Comment and Explain : Divide
square to 4 parts equal . Take 1 part
and color . So that the part is colored
, and is “One fourth” of the square
 Memorize : To find A
quarter , we divide the
pictures to 4 parts , and take
1 parts , that is One fourth
1

+Teaching how to write sign 4 :
The number one writes above the
hyphen , the number four writers

under the hyphen . Read “One
fourth”

+ Students follow the guide to
answer the questions :
 4 parts
 Yes , it is equal
 1 part
+ Listen carefully

+ 1 Student read . Whole class read
the memorize
+ Listen carefully , follow the
directions and practice write on
small broad .

+Students look and do exactly what
the teacher teach with the circle.


+Teacher processes the same thing
with circle : Divide the circle to 4
parts equal , take 1 part and color ,
have a quarter of the circle.
+Ask students repeat how to find ,
write and read “One fourth” .
 Activity 2 : Practice , do
excersies
- Aim : Students know
1

4

. Practise divide to

4 parts equal.
- Processdings :
Excersie 1 : What a quarter of the
picture is colored ?

A

B

+ Students repeat

C

D

Teacher ask the students some
questions and explains :
+ How many parts of picture D are
divided ?
+ How many parts of picture D are
colored ?
 So that picture D is not the
picture was colored to One
fourth.
4. Consolidate , advice
- Teacher organizies

game “Who fast , who
right”
+ Prepare : Some different pictures
are divided to different parts
+ Process : The presidents of 4
teams in class go to the broad write
fast and right which parts are colored
.
+ Teacher checks , comments and

+ Students read the tilte
+ Students look the picture and
chose the right answer
+ Whole class comement, add ,
check the text
+ Picture A, B,C is the “ One fourth”
+ Picture D is divided to 6 parts
+There are 2 parts of picture D
colored

+ Students listen the rules
+ Students play the game

+Students repeat the memorize how
1

to find 4


concludes